Manifold pressure operated throttle valve system for a multiple speed ratio power transmission mechanism

Claim 1

AN AUTOMATIC CONTROL FOR A MULTIPLE SPEED RATIO POWER TRANSMISSION MECHANISM HAVING A GEAR SYSTEM FOR CONNECTING AN ENGINE TO A DRIVEN MEMBER, SAID ENGINE HAVING A FUEL-AIR INTAKE MANIFOLD, A FLUID PRESSURE SOURCE, FLUID PRESSURE OPERATED SERVOS, CLUTCH AND BRAKE MEANS FOR CONTROLLING THE RELATIVE MOTION OF ELEMENTS OF SAID GEAR SYSTEM AND RESPONDING TO OPERATION OF SAID SERVOS, CONDUIT STRUCTURE INCLUDING A CONTROL VALVE SYSTEM FOR ESTABLISHING A CONNECTION BETWEEN SAID PRESSURE SOURCE AND SAID SERVOS, A REGULATOR VALVE MECHANISM IN FLUID COMMUNICATION WITH SAID SOURCE FOR MAINTAINING A DESIRED OPERATING PRESSURE LEVEL IN SAID CONTROL SYSTEM, A SOURCE OF A GOVERNOR SPEED SIGNAL THAT IS PROPORTIONAL IN MAGNITUDE TO THE DRIVEN SPEED OF SAID DRIVEN MEMBER, A THROTTLE PRESSURE VALVE MECHANISM FOR ESTABLISHING A PRESSURE SIGNAL THAT IS RELATED IN MAGNTIUDE TO THE OPERATING TORQUE REQUIREMENTS OF THE TRANSMISSION MECHANISM, MEANS FOR DISTRIBUTING SAID PRESSURE SIGNALS TO SAID REGULATOR VALVE MECHANISM AND SAID CONTROL SYSTEM FOR INFLUENCING THE OPERATION THEREOF, SAID THROTTLE VALVE MECHANISM COMPRISING A MOVABLE VALVE ELEMENT, A MANIFOLD PRESSURE OPERATED SERVO COMPRISING A SERVO BODY, A DIAPHRAGM DISPOSED WITHIN SAID BODY AND MECHANICALLY CONNECTED TO SAID MOVABLE VALVE ELEMENT, ONE PORTION OF SAID BODY AND SAID DIAPHRAGM COOPERATING TO DEFINE A MANIFOLD PRESSURE CHAMBER, MANIFOLD PRESSURE PASSAGE EXTENDING BETWEEN SAID ENGINE MANIFOLD AND SAID MANIFOLD CHAMBER, A DIAPHRAGM SPRING DISPOSED BETWEEN SAID DIAPHRAGM AND SAID BODY, A SPRING SEAT MEMBER DISPOSED WITHIN SAID BODY AND ENGAGING ONE END OF SAID SPRING, A FLUID FITTING CONNECTED TO SAID BODY AND PROJECTING THEREFROM, AN ADJUSTING ELEMENT THREADABLY CONNECTED TO SAID FITTING AND MOVABLE IN THE DIRECTION OF THE LINE OF ACTION OF SAID SPRING, SAID MANIFOLD PRESSURE PASSAGE BEING ADAPTED TO BE RECEIVED OVER SAID FITTING, SAID FITTING HAVING AN INTERNALLY THREADED OPENING, SAID ADJUSTING MEMBER BEING RECEIVED WITHIN SAID OPENING AND ENGAGEABLE WITH SAID SPRING SEAT, SAID ADJUSTING ELEMENT BEING ADAPTED TO BE ADJUSTED BY A SUITABLE HAND TOOL TO EFFECT AXIAL ADJUSTMENT OF SAID SPRING SEAT.